HTRACE-256 Change the artifactId for htrace-core in branch 4.0 to be htrace-core4
HTRACE-256 Change the artifactId for htrace-core in branch 4.0 to be htrace-core4

clehene/incubator-htrace,madrob/incubator-htrace,madrob/incubator-htrace,madrob/incubator-htrace,reta/incubator-htrace,clehene/incubator-htrace,apache/incubator-htrace,madrob/incubator-htrace,clehene/incubator-htrace,clehene/incubator-htrace,clehene/incubator-htrace,clehene/incubator-htrace,reta/incubator-htrace,apache/incubator-htrace,apache/incubator-htrace,madrob/incubator-htrace,apache/incubator-htrace,apache/incubator-htrace,apache/incubator-htrace,reta/incubator-htrace,madrob/incubator-htrace,clehene/incubator-htrace,madrob/incubator-htrace,reta/incubator-htrace,apache/incubator-htrace,apache/incubator-htrace,reta/incubator-htrace,reta/incubator-htrace,reta/incubator-htrace